12920805

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{9901}}^1$

素因数の和:9941

約数の個数: 24

約数和(自身を含む): 23170680

約数和(自身を除く): 10249875

約数列:

[1, 3, 5, 9, 15, 29, 45, 87, 145, 261, 435, 1305, 9901, 29703, 49505, 89109, 148515, 287129, 445545, 861387, 1435645, 2584161, 4306935, 12920805]

約数ペア:

[(1, 12920805), (3, 4306935), (5, 2584161), (9, 1435645), (15, 861387), (29, 445545), (45, 287129), (87, 148515), (145, 89109), (261, 49505), (435, 29703), (1305, 9901)]